Folding device for bicycle and bicycle

Abstract

The utility model provides a folding device for a bicycle and a bicycle. The folding device comprises an upper tube, a lower tube, a switch assembly and a linkage assembly, wherein the upper tube, the lower tube, the switch assembly and the linkage assembly are pivotally connected in sequence to form a four-link mechanism, and the switch assembly is configured to switchably connect the upper tube and the lower tube, when the folding device is in the self-locking state, the switch assembly locks and fixes the upper tube and the lower tube; when the folding device is in the unlocking state, the switch assembly is unlocked, and the upper tube and the lower tube connected by the linkage assembly and the switch assembly rotate from the stacking position to the unfolding position, and the bicycle body connected by the upper tube and the lower tube can be folded up and down or folded forward and backward when the folding device is in the unlocking state.

Description

Technical Field

[0001] The present invention relates to the technical field of transportation tools, in particular to a folding device for a bicycle and a bicycle. Background Art

[0002] A folding bicycle is a portable and flexible means of transportation that can be easily folded into a smaller size when needed, making it easy to carry and store. A folding bicycle usually consists of a folding frame, folding wheels, and foldable handlebars. These designs allow the bicycle to be easily put into a small space such as a vehicle trunk, public transportation, or office when not in use.

[0003] The main function of the folding device of the existing bicycle technology is to firmly fix the upper tube (upper frame) and the lower tube (lower frame) together, so as to realize the folding and unfolding of the whole bicycle. The folding device of the existing technology also has at least one of the following defects: First, the folding device of the existing bicycle technology mostly adopts semi-automatic operation or pure manual method for locking. The folding device of this structure is old and inconvenient to operate. It takes a lot of time to open and close each time; secondly, the stability and convenience of use of the simple structure of the folding device of the existing bicycle technology are too poor, and the manufacturing cost of the complex structure is too high, which is not suitable for most models; thirdly, the folding device of the bicycle technology needs to be locked when folded and closed to avoid automatic opening, but if there is an improper operation method or inadequate operation, there will be safety problems. In other words, it is difficult for the folding device of the existing bicycle technology to achieve folding safety protection, so there are safety hazards. Summary of the invention

[0004] A major advantage of the present invention is to provide a folder for bicycles and a bicycle, wherein the folder can be a folding mechanism that is fully automatically locked in place, which simplifies the operation of the customer and improves the convenience of use.

[0005] Another advantage of the present invention is to provide a folding device for a bicycle and a bicycle, wherein the folding device has at least one safety protection function, which avoids safety problems caused by improper operation when the folding device is closed, thereby improving safety.

[0006] Another advantage of the present invention is to provide a folding device for bicycles and a bicycle, wherein the folding device is provided with a double safety self-locking structure. Considering the possible operational problems of the user, we have designed double protection to further enhance the safety of the device.

[0007] Another advantage of the present invention is that it provides a folding device for a bicycle and a bicycle, wherein when the upper tube of the folding device rotates, the handle is driven to rotate under the action of a connecting rod; when the upper and lower tubes are closed, the locking column of the controller block will directly snap into the first limit protection hole of the upper tube under the action of inertia and a torsion spring, ensuring that the folding device can still provide protection even if it is not folded into place, thereby ensuring the safety of the rider.

[0008] Another advantage of the present invention is that it provides a folding device for a bicycle and a bicycle, wherein the upper tube of the folding device continues to rotate until it is combined with the lower tube, and the self-locking buckle will clamp the upper and lower tubes under the action of the second torsion spring, thereby playing the role of the first protection; at the same time, the third torsion spring will make the round head end of the top column fit into the corresponding groove of the upper tube, and because there is a limit on the top column, it plays the role of limiting the separation of the upper and lower tubes (the second protection); the handle body will also enter the first limit space under the action of inertia, thereby playing the role of the third protection.

[0009] Another advantage of the present invention is to provide a folder for bicycle and a bicycle, wherein the folder is easy to operate and has high reliability. Therefore, the present application provides an economical and effective solution.

[0010] According to one aspect of the present invention, a folding device for a bicycle of the present invention can achieve the aforementioned purpose and other purposes and advantages. The folding device includes an upper tube, a lower tube, a switch assembly and a linkage assembly, wherein the upper tube, the lower tube, the switch assembly and the linkage assembly are pivotally connected in sequence to form a four-bar linkage, and the switch assembly is configured to switchably connect the upper tube and the lower tube, when the folding device is in the self-locking state, the switch assembly locks and fixes the upper tube and the lower tube; when the folding device is in the unlocking state, the switch assembly is unlocked, and the upper tube and the lower tube connected by the linkage assembly and the switch assembly rotate from the stacking position to the unfolding position, and the bicycle body connected by the upper tube and the lower tube can be folded up and down or forward and backward when the folding device is in the unlocking state.

[0011] According to one embodiment of the present invention, the upper tube of the folder includes an upper tube body, an upper tube axial rotation end arranged on the upper tube body, an upper tube rotating end and an upper tube locking end; the lower tube includes a lower tube body, a lower tube axial rotation end arranged on the lower tube body and a lower tube rotating end, wherein the upper tube axial rotation end of the upper tube and the lower tube axial rotation end of the lower tube are located on the same side, and the upper tube axial rotation end is pivotally connected to the lower tube axial rotation end, and the upper tube rotating end and the lower tube rotating end are located on the same side, wherein the lower tube rotating end is pivotally connected to the switch assembly, and the upper tube rotating end is pivotally connected to the linkage assembly.

[0012] According to one embodiment of the present invention, the switch assembly includes a switch handle and a control switch movably arranged on the switch handle, wherein the switch handle is pivotally connected to the lower tube rotating end of the lower tube and the linkage assembly, and wherein the control switch is lockably connected to the upper tube locking end of the upper tube for opening and locking the folder.

[0013] According to one embodiment of the present invention, the linkage assembly includes at least one adjustment connecting rod and at least one supporting shaft rod, wherein the supporting shaft rod is arranged at the end of the adjustment connecting rod, and the adjustment connecting rod is pivotally connected to the switch assembly and the upper tube rotating end of the upper tube through the at least one supporting shaft rod, and the end of the supporting shaft rod can rotate along the axial direction of the supporting shaft rod.

[0014] According to one embodiment of the present invention, the upper tube locking end of the upper tube is provided with a locking hole corresponding to the control switch, and the control switch of the switch assembly further includes a switch button and a locking column located at the switch button, wherein the locking column protrudes from one side of the switch button, and when the locking column of the control switch is inserted into the locking hole at the locking end of the upper tube, the folder is in the self-locking state.

[0015] According to one embodiment of the present invention, the locking end of the upper tube is further provided with a limiting hole and a limiting groove, wherein the limiting hole is located on the outside of the locking hole, and the limiting groove connects the limiting hole and the locking hole, and when the folder is in the locking process, the locking column of the control switch slides into the locking hole through the limiting hole along the limiting groove.

[0016] According to another aspect of the present application, the present application further provides a folding device for a bicycle, the folding device comprising an upper tube, a lower tube, a switch assembly and a linkage assembly, wherein the upper tube and the lower tube are pivotally connected, the switch assembly and the linkage assembly are pivotally arranged on the lower tube, and the switch assembly is linked to the linkage assembly, and the switch assembly and the linkage assembly are arranged to be lockably connected to the upper tube.

[0017] According to one embodiment of the present invention, the upper tube includes an upper tube body, an upper tube axial rotation end arranged on the upper tube body, an upper tube rotating end and an upper tube locking end; the lower tube includes a lower tube body, a lower tube axial rotation end arranged on the lower tube body and a lower tube rotating end, the upper tube axial rotation end is pivotally connected to the lower tube axial rotation end, the lower tube rotating end is pivotally connected to the switch assembly, and the upper tube rotating end is pivotally connected to the linkage assembly.

[0018] According to one embodiment of the present invention, the upper tube further includes a limit end, and the limit end corresponds to the position of the linkage assembly, and the linkage assembly includes a top column, a self-locking buckle and a linkage unit, wherein the top column is movably arranged on the switch assembly, which is used to buckle against the limit end of the upper tube, the self-locking buckle is arranged on the lower tube rotating end of the lower tube, and the self-locking buckle includes a rotating shaft and a hook arranged on the rotating shaft, wherein the rotating shaft of the self-locking buckle is pivotally arranged on the lower tube rotating end of the lower tube.

[0019] According to one embodiment of the present invention, the switch assembly includes a switch handle and a control switch movably arranged on the switch handle, wherein the switch handle is pivotally connected to the lower tube rotating end of the lower tube and the linkage assembly, the linkage unit is fixed to the switch handle of the switch assembly through a through hole of the self-locking buckle, and when the switch handle is opened outward, the switch handle pulls the self-locking buckle to move synchronously through the linkage unit.

[0020] According to another aspect of the present application, the present application further provides a bicycle, comprising:

[0021] The bicycle body; and

[0022] The folder as described in any one of the above, wherein the folder is provided on the bicycle body.

[0023] Further objects and advantages of the present invention will be fully apparent from an understanding of the following description and the accompanying drawings.

[0024] These and other objects, features and advantages of the present invention will be more fully understood from the following detailed description and accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 1 is an overall schematic diagram of a folding device for a bicycle according to a first preferred embodiment of the present invention.

[0026] Figure 2A and Figure 2B It is a schematic diagram of the folder in the self-locking state and the unlocking state according to the first preferred embodiment of the present application.

[0027] Figure 3 It is a cross-sectional view of the folder in the self-locking state according to the first preferred embodiment of the present application.

[0028] Figure 4 FIG. 1 is an overall schematic diagram of a folder for a bicycle according to a second preferred embodiment of the present invention.

[0029] Figure 5A and Figure 5BIt is a schematic diagram of the folder in the self-locking state and the unlocking state according to the second preferred embodiment of the present application.

[0030] Figure 6 It is a schematic diagram of the folder in the unlocking and opening process according to the second preferred embodiment of the present invention.

[0031] Figure 7 It is a schematic diagram of the folder in the folding and locking process according to the second preferred embodiment of the present invention. DETAILED DESCRIPTION

[0032] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles of the present invention defined in the following description can be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not deviate from the spirit and scope of the present invention.

[0033] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0034] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0035] Referring to the drawings of this application specification Figures 1 to 3 As shown, a folding device for a bicycle and a bicycle according to the first preferred embodiment of the present application are explained in the following description. The bicycle includes a bicycle body (not shown in the figure) and a folding device arranged on the bicycle body, wherein the folding device is foldably switched between a self-locking state and an unlocking state. When the folding device is in the self-locking state, the folding device connects and supports the upper frame and the lower frame of the bicycle body, and the bicycle body remains unfolded and suitable for users to ride; when the folding device is in the unlocking state, the bicycle body connected by the folding device can be rotated along the folding device and adjusted to a folded state, which is convenient for storage and storage.

[0036] The folder comprises an upper tube 10, a lower tube 20, a switch assembly 30 and a linkage assembly 40, wherein the upper tube 10, the lower tube 20, the switch assembly 30 and the linkage assembly 40 are pivotally connected in sequence to form a four-bar linkage, and the switch assembly 30 is configured to switchably connect the upper tube 10 and the lower tube 20, the upper tube 10 is connected to the upper frame of the bicycle body, and the lower tube 20 is connected to the lower frame of the bicycle body; when the folder is in the self-locking state, the switch assembly 30 locks and fixes the upper tube 10 and the lower tube 20, so that The upper tube 10 and the lower tube 20 of the folder are in a stacked position, that is, the upper tube 10 and the lower tube 20 are stacked up and down or stacked front and back and fixedly connected by the switch assembly 30; when the folder is in the unlocked state, the switch assembly 30 is unlocked, and the linkage assembly 40 and the upper tube 10 and the lower tube 20 connected with the switch assembly 30 are rotated from the stacked position to the unfolded position, and the bicycle body connected by the upper tube 10 and the lower tube 20 can be folded up and down or folded front and back when the folder is in the unlocked state, which is convenient for storage and storage.

[0037] The upper tube 10 of the folder includes an upper tube body 11, an upper tube axial rotation end 12 arranged on the upper tube body 11, an upper tube rotating end 13 and an upper tube locking end 14; the lower tube 20 includes a lower tube body 21, a lower tube axial rotation end 22 arranged on the lower tube body 21 and a lower tube rotating end 23, wherein the upper tube axial rotation end 12 of the upper tube 10 and the lower tube axial rotation end 22 of the lower tube 20 are located on the same side, and the upper tube axial rotation end 12 is pivotally connected to the lower tube axial rotation end 22, the upper tube rotating end 13 and the lower tube rotating end 23 are located on the same side, wherein the lower tube rotating end 23 is pivotally connected to the switch assembly 30, and the upper tube rotating end 13 is pivotally connected to the linkage assembly 40.

[0038] It can be understood that in this preferred embodiment of the present application, the upper tube axial rotating end 12 and the upper tube rotating end 13 of the upper tube 10 form the first link of the four-bar linkage, the lower tube axial rotating end 22 and the lower tube rotating end 23 of the lower tube 20 form the second link of the four-bar linkage, the switch assembly 30 forms the third link of the four-bar linkage, and the linkage assembly 40 forms the fourth link of the four-bar linkage.

[0039] The upper tube axial rotation end 12 and the upper tube rotating end 13 of the upper tube 10 are arranged back to back on opposite sides of the upper tube body 11, and the lower tube axial rotation end 22 and the lower tube rotating end 23 of the lower tube 20 are arranged back to back on opposite sides of the lower tube body 21. Preferably, in this preferred embodiment of the present application, the upper tube axial rotation end 12 and the upper tube rotating end 13 of the upper tube 10 extend outward from the end (such as the bottom) of the upper tube body 11 as a whole, and the lower tube axial rotation end 22 and the lower tube rotating end 23 of the lower tube 20 extend outward from the end (such as the top) of the lower tube body 21 as a whole. The upper tube body 11 of the upper tube 10 is a conical tube or a cylindrical tubular structure, and the lower tube body 21 of the lower tube 20 is a round tube structure.

[0040] The upper tube locking end 14 of the upper tube 10 is on the same side as the upper tube rotating end 13, wherein one end of the switch assembly 30 is pivotally connected to the lower tube rotating end 23, and the other end of the switch assembly 30 is lockably connected to the upper tube locking end 14 of the upper tube 10, when the other end of the switch assembly 30 is connected to the upper tube locking end 14 of the upper tube 10, the folder is in the self-locking state, and the switch assembly 30 connects and fixes the upper tube 10 and the lower tube 20. When the switch assembly 30 is in the unlocking state, the other end of the switch assembly 30 is opened, and the upper tube 10 and the lower tube 20 can be turned outward along the upper tube axial rotating end 12 and the upper tube rotating end 13 under the connection of the switch assembly 30 and the linkage assembly 40.

[0041] The switch assembly 30 includes a switch handle 31 and a control switch 32 movably disposed on the switch handle 31, wherein the switch handle 31 is pivotally connected to the lower tube rotating end 23 of the lower tube 20 and the linkage assembly 40, wherein the control switch 32 is lockably connected to the upper tube locking end 14 of the upper tube 10 for opening and locking the folder.

[0042] The linkage assembly 40 includes at least one adjustment connecting rod 41 and at least one support shaft rod 42, wherein the support shaft rod 42 is arranged at the end of the adjustment connecting rod 41, and the adjustment connecting rod 41 is pivotally connected to the switch assembly 30 and the upper tube rotating end 13 of the upper tube 10 through the at least one support shaft rod 42, and the end of the support shaft rod 42 can rotate along the axial direction of the support shaft rod 42.

[0043] In this preferred embodiment of the present application, the number of the support shafts 42 is two, wherein the support shafts 42 are arranged at the end of the adjustment connecting rod 41, and the adjustment connecting rod 41 is connected to the switch handle 31 of the switch assembly 30 and the upper tube rotating end 13 of the upper tube 10 through the support shafts 42.

[0044] The unlocking process of the folder: the control switch 32 of the switch assembly 30 is rotatably arranged on one side of the switch handle 31, wherein the upper tube locking end 14 of the upper tube 10 is provided with a locking hole 141 corresponding to the control switch 32. The control switch 32 of the switch assembly 30 further includes a switch button 321 and a locking column 322 located at the switch button, wherein the locking column 322 protrudes from one side of the switch button 321, when the locking column 322 of the control switch 32 is inserted into the locking hole 141 of the upper tube locking end 14, the folder is in the self-locking state, and when the locking column 322 of the control switch 32 is disengaged from the locking hole 141 of the upper tube locking end 14, the folder is in the unlocking state.

[0045] When unlocking, the control switch 32 of the switch assembly 30 is pressed to disengage the lock hole 141 of the control upper tube locking end 14, and the switch handle 31 of the switch assembly 30 or the upper tube body 11 of the upper tube 10 is pulled, so that the four-bar linkage composed of the switch handle 31, the adjustment connecting rod 41, the upper tube 10 (upper tube axial rotating end 12 and the upper tube rotating end 13) and the lower tube 20 (lower tube axial rotating end 22 and the lower tube rotating end 23) opens until the upper tube 10 and the lower tube 20 are fully opened under the connection action of the switch handle 31 and the adjustment connecting rod 41.

[0046] The locking process of the folder is as follows: the upper tube body 11 of the upper tube 10 is rotated toward the direction of the upper tube rotating end 13, and the switch handle 31 and the adjustment connecting rod 41 of the switch assembly 30 are driven to rotate synchronously under the action of the connecting rod structure; when the upper tube 10 and the lower tube 20 are closed, the control switch 32 of the switch assembly 30 is inserted into the locking hole 141 of the upper tube locking end 14, so that the folder is in the self-locking state.

[0047] The upper tube locking end 14 of the upper tube 10 is further provided with a limiting hole 142 and a limiting groove 143, wherein the limiting hole 142 is located outside the locking hole 141, and the limiting groove 143 communicates the limiting hole 142 and the locking hole 141. When the folder is in the locking process, the locking column 322 of the control switch 32 slides into the locking hole 141 through the limiting hole 142 along the limiting groove 143. When the folder is not folded into place, the locking column 322 of the control switch 32 is in the limiting groove 143 or the limiting hole 142, which plays a double protection role, ensuring that the folder will have a protective effect even if it is not folded into place, thereby ensuring the safety of the rider. That is to say, when the locking column 322 is inserted into the locking hole 141 or the locking column 322 is in the limiting groove 143 or the limiting hole 142, it can play a protective role when the folder is not fully folded, preventing the folder from automatically opening.

[0048] The adjustment connecting rod 41 is connected to the supporting shaft 42, wherein one end of the adjustment connecting rod 41 has a threaded structure with adjustable length, and the supporting shaft 42 is provided with a corresponding threaded hole. By adjusting the effective connection length between the adjustment connecting rod 41 and the supporting shaft 42, the locking force function of the folder can be adjusted.

[0049] The switch assembly 30 of the folder further includes at least one torsion spring 33 , wherein the torsion spring 33 is disposed on the control switch 32 of the switch assembly 30 to ensure that the control switch 32 can rebound.

[0050] The upper tube 10 is further provided with a clearance groove 103 , wherein the clearance groove 103 is formed at a position where the upper tube body 11 of the upper tube 10 is directly opposite to the adjustment connecting rod 41 , so as to avoid collision between the upper tube 10 and the adjustment connecting rod 41 during unfolding.

[0051] Referring to the drawings of this application specification Figures 4 to 7 As shown, a folding device for a bicycle according to a second preferred embodiment of the present application is explained in the following description, wherein the folding device includes an upper tube 10A, a lower tube 20A, a switch assembly 30A and a linkage assembly 40A, wherein the upper tube 10A and the lower tube 20A are pivotally connected, the switch assembly 30A and the linkage assembly 40A are pivotally arranged on the lower tube 20A, and the switch assembly 30A is linked to the linkage assembly 40A, and the switch assembly 30A and the linkage assembly 40A are arranged to be lockably connected to the upper tube 10A, and switch between a self-locking state and an unlocking state.

[0052] It is worth mentioning that the structures of the lower tube 20A and the switch assembly 30A are the same as those of the first preferred embodiment, which will not be described in detail. The upper tube 10A includes an upper tube body 11A, an upper tube shaft rotation end 12A disposed on the upper tube body 11A, an upper tube rotation end 13A, and an upper tube locking end 14A; the lower tube 20A includes a lower tube body 21A, a lower tube shaft rotation end 22A disposed on the lower tube body 21A, and a lower tube rotation end 23A. A, wherein the upper tube axial rotation end 12A of the upper tube 10A and the lower tube axial rotation end 22A of the lower tube 20A are located on the same side, and the upper tube axial rotation end 12A is pivotally connected to the lower tube axial rotation end 22A, the upper tube rotating end 13A is located on the same side as the lower tube rotating end 23A, wherein the lower tube rotating end 23A is pivotally connected to the switch assembly 30A, and the upper tube rotating end 13A is pivotally connected to the linkage assembly 40A. The switch assembly 30A includes a switch handle 31A and a control switch 32A movably disposed on the switch handle 31A, wherein the switch handle 31A is pivotally connected to the lower tube rotating end 23A of the lower tube 20A and the linkage assembly 40A, wherein the control switch 32A is lockably connected to the upper tube locking end 14A of the upper tube 10A for opening and locking the folder.

[0053] The difference from the first preferred embodiment is the upper tube 10A and the linkage assembly 40A, wherein the upper tube 10A further includes a limit end 15A, the limit end 15A corresponds to the position of the linkage assembly 40A, and the linkage assembly 40A includes a top column 41A, a self-locking buckle 42A and a linkage unit 43A, wherein the top column 41A is movably arranged on the switch assembly 30A, which is used to buckle against the limit end 15A of the upper tube 10A, and when the folder is in a self-locking state, it provides limit protection to prevent the upper tube 10A and the lower tube 20A from separating. The self-locking buckle 42A is movably arranged on the lower tube 20A, and the self-locking buckle 42A can be buckled on the limit end 15A of the upper tube 10A. When the folder is in a self-locking state, the self-locking buckle 42A buckles the upper tube 10A and the lower tube 20A together to prevent the upper tube 10A and the lower tube 20A from separating. The linkage unit 43A is arranged in the switch assembly 30A, and one end of the linkage unit 43A is connected to the self-locking buckle 42A. When the switch assembly 30A is opened, the switch assembly 30A drives the self-locking buckle 42A to separate from the limiting end 15A of the upper tube 10A through the linkage unit 43A.

[0054] In detail, the top column 41A of the linkage assembly 40A includes an adjustable connecting column 411A and a limiting ball 412A arranged at the end of the adjustable connecting column 411A, wherein the other end of the adjustable connecting column 411A has a connecting thread, and the effective length of the adjustable connecting column 411A can be adjusted by adjusting the length of the connecting thread and the connecting unit (connecting screw), thereby adjusting the locking force of the folder.

[0055] One end of the top column 41A is connected to the switch handle 31A of the switch assembly 30A via a connecting shaft, wherein the top column 41A can rotate along the axial direction of the connecting shaft. After the switch assembly 30A is turned on, the switch handle 31A of the switch assembly 30A can drive the top column 41A to move outward synchronously, and the limiting ball 412A of the top column 41A is disengaged from the limiting end 15A of the upper tube 10A.

[0056] It is worth mentioning that the limiting end 15A is provided with a spherical groove 151A, and the spherical groove 151A corresponds to the limiting ball 412A of the top column 41A. When the limiting ball 412A of the top column 41A is in the spherical groove 151A, the top column 41A abuts against one side of the limiting end 15A, that is, the top column 41A abuts against the upper tube 10A and the lower tube 20A, thereby preventing the upper tube 10A and the lower tube 20A from separating.

[0057] The self-locking buckle 42A is arranged at the lower tube rotating end 23A of the lower tube 20A, and the self-locking buckle 42A includes a rotating shaft 421A and a hook 422A arranged at the rotating shaft 421A, wherein the rotating shaft 421A of the self-locking buckle 42A is pivotally arranged at the lower tube rotating end 23A of the lower tube 20A, and when the folder is in the self-locking state, the hook 422A is buckled on the limiting end 15A, thereby preventing the upper tube 10A and the lower tube 20A from separating, thereby forming another protective effect. In this preferred embodiment of the present application, the hook 422A of the self-locking buckle 42A and the limiting end 15A are in a mutually buckled grabbing structure.

[0058] The hook 422A of the self-locking buckle 42A is formed at the end of the rotating shaft 421A, and a groove 423A is further formed by the hook 422A, wherein the limiting ball 412A of the top column 41A is placed in the groove 423A of the self-locking buckle 42A, and the self-locking buckle 42A and the top column 41A form a linkage structure through the limiting ball 412A and the groove 423A.

[0059] The linkage unit 43A passes through the through hole of the self-locking buckle 42A and is fixed to the switch handle 31A of the switch assembly 30A. When the switch handle 31A is opened outward, the switch handle 31A pulls the self-locking buckle 42A to move synchronously through the linkage unit 43A, so that the hook 422A of the self-locking buckle 42A is separated from the limit end 15A.

[0060] When the linkage unit 43A reaches a certain position, the linkage unit 43A will hook the locking buckle 42A, drive the locking buckle 42A to move together, and completely unlock the locking device; at the same time, when folding, the switch handle 31A will be driven by the locking buckle 42A under the drive of the linkage unit 43A, and move to the expected limit point.

[0061] Preferably, in this preferred embodiment of the present application, the linkage unit 43A is implemented as a linkage screw.

[0062] It is worth mentioning that in this preferred embodiment of the present application, the control switch 32A has the same structure as the control switch 32 in the first preferred embodiment, and will not be described again. Therefore, the control switch 32A can be buckled on the upper tube locking end 14A of the upper tube 10A to provide a third protection structure when the folder is in the self-locking state.

[0063] The unlocking process of the folder is as follows: pressing the control switch 32A of the switch assembly 30A, and the control switch 32A is separated from the upper tube locking end 14A of the upper tube 10A; the user can operate the switch handle 31A of the switch assembly 30A with one hand, and while pulling the switch handle 31A, the switch handle 31A pulls the self-locking buckle 42A to move through the linkage unit 43A, and the self-locking buckle 42A is separated from the limiting end 15A of the upper tube 10A; and the switch handle 31A drives the top column 41A to rotate, so that the limiting ball 412A of the top column 41A disengages from the groove 423A, contacts the abutment between the upper tube 10A and the lower tube 20A, thereby allowing relative rotation between the upper tube 10A and the lower tube 20A, that is, the upper tube 10A and the lower tube 20A are in an unlocked state.

[0064] The switch assembly 30A of the folder further includes at least one torsion spring 33A, wherein the torsion spring 33A is disposed on the self-locking buckle 42A of the linkage assembly 40A to provide a pre-tightening force for the self-locking buckle 42A in an unlocked state.

[0065] The locking process of the folder: used to rotate the upper tube 10A until the upper tube 10A and the lower tube 20A are combined (stacked up and down or stacked front and back), the self-locking buckle 42A will clamp the upper tube 10A and the lower tube 20A under the action of the torsion spring, playing the first protection role. The self-locking buckle 42A drives the top column 41A to abut against the groove of the limit end 15A, so that the upper tube 10A and the lower tube 20A abut against each other. Therefore, the top column 41A has a limit, thereby limiting the separation of the upper tube 10A and the lower tube 20A, that is, the second protection role. The control switch 32A of the switch assembly 30A is mutually buckled with the upper tube locking end 14A of the upper tube 10A, forming a third protection role, preventing the upper tube 10A and the lower tube 20 from separating. That is to say, during the locking process, the folder has three protection modes, and the upper tube 10A and the lower tube 20A are separated.

[0066] It should be understood by those skilled in the art that the embodiments of the present invention described above and shown in the accompanying drawings are only examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functional and structural principles of the present invention have been demonstrated and explained in the embodiments, and the embodiments of the present invention may be deformed or modified in any way without departing from the principles.

Claims

1. A folding device for a bicycle, characterized in that: The folder comprises an upper tube, a lower tube, a switch assembly and a linkage assembly, wherein the upper tube, the lower tube, the switch assembly and the linkage assembly are pivotally connected in sequence to form a four-bar linkage, and the switch assembly is configured to switchably connect the upper tube and the lower tube, wherein the folder is foldably switched between a self-locking state and an unlocking state, wherein the upper tube of the folder comprises an upper tube body, an upper tube shaft rotating end arranged on the upper tube body, an upper tube rotating end and an upper tube locking end; the lower tube comprises a lower tube A main body, a lower tube axial rotation end and a lower tube rotating end arranged on the lower tube main body, wherein the upper tube axial rotation end of the upper tube and the lower tube axial rotation end of the lower tube are located on the same side, and the upper tube axial rotation end is pivotally connected to the lower tube axial rotation end, and the upper tube rotating end is located on the same side as the lower tube rotating end, wherein the lower tube rotating end is pivotally connected to the switch assembly, and the upper tube rotating end is pivotally connected to the linkage assembly, and when the folder is in the self-locking state, the switch assembly locks and fixes the upper tube and the lower tube; When the folder is in the unlocked state, the switch assembly is unlocked, the upper tube and the lower tube connected to the linkage assembly and the switch assembly rotate from the stacked position to the unfolded position, and the bicycle body connected by the upper tube and the lower tube can be folded up and down or forward and backward when the folder is in the unlocked state.

2. The folder according to claim 1, wherein the switch assembly comprises a switch handle and a control switch movably arranged on the switch handle, wherein the switch handle is pivotally connected to the lower tube rotating end of the lower tube and the linkage assembly, wherein the control switch is lockably connected to the upper tube locking end of the upper tube for opening and locking the folder.

3. A folder according to claim 2, wherein the linkage assembly includes at least one adjustment connecting rod and at least one supporting shaft rod, wherein the supporting shaft rod is arranged at the end of the adjustment connecting rod, and the adjustment connecting rod is pivotally connected to the switch assembly and the upper tube rotating end of the upper tube through the at least one supporting shaft rod, and the end of the supporting shaft rod can rotate along the axial direction of the supporting shaft rod.

4. The folder according to claim 3, wherein the upper tube locking end of the upper tube is provided with a locking hole corresponding to the control switch, and the control switch of the switch assembly further comprises a switch button and a locking column located at the switch button, wherein the locking column protrudes from one side of the switch button, and when the locking column of the control switch is inserted into the locking hole at the locking end of the upper tube, the folder is in the self-locking state.

5. The folder according to claim 4, wherein the locking end of the upper tube is further provided with a limiting hole and a limiting groove, wherein the limiting hole is located on the outside of the locking hole, and the limiting groove connects the limiting hole and the locking hole, and when the folder is in the locking process, the locking column of the control switch slides into the locking hole through the limiting hole along the limiting groove.

6. A folding device for a bicycle, characterized in that: The folder includes an upper tube, a lower tube, a switch assembly and a linkage assembly, wherein the upper tube and the lower tube are pivotally connected, the switch assembly and the linkage assembly are pivotally arranged on the lower tube, and the switch assembly is linked to the linkage assembly, and the switch assembly and the linkage assembly are arranged to be lockably connected to the upper tube.

7. The folder according to claim 6, wherein the upper tube includes an upper tube body, an upper tube axial rotation end arranged on the upper tube body, an upper tube rotating end and an upper tube locking end; the lower tube includes a lower tube body, a lower tube axial rotation end arranged on the lower tube body and a lower tube rotating end, the upper tube axial rotation end is pivotally connected to the lower tube axial rotation end, the lower tube rotating end is pivotally connected to the switch assembly, and the upper tube rotating end is pivotally connected to the linkage assembly.

8. The folder according to claim 7, wherein the upper tube further includes a limit end, the limit end corresponds to the position of the linkage assembly, the linkage assembly includes a top column, a self-locking buckle and a linkage unit, wherein the top column is movably arranged on the switch assembly, which is used to buckle against the limit end of the upper tube, the self-locking buckle is arranged on the lower tube rotating end of the lower tube, and the self-locking buckle includes a rotating shaft and a hook arranged on the rotating shaft, wherein the rotating shaft of the self-locking buckle is pivotally arranged on the lower tube rotating end of the lower tube.

9. The folder according to claim 8, wherein the switch assembly comprises a switch handle and a control switch movably arranged on the switch handle, wherein the switch handle is pivotally connected to the lower tube rotating end of the lower tube and the linkage assembly, the linkage unit is fixed to the switch handle of the switch assembly through the through hole of the self-locking buckle, and when the switch handle is opened outward, the switch handle pulls the self-locking buckle to move synchronously through the linkage unit.

10. A bicycle, characterized in that include: Bicycle body; and The folder according to any one of claims 1 to 9, wherein the folder is provided on the bicycle body.

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